如何在RSS Feed中显示ListView中的链接和描述？

问题描述：

我想在列表视图中显示从RSS提要网站解析的标题和说明。现在它只能显示标题。我已经完成了描述的提取。我需要在标题下面显示说明。我怎样才能做到这一点？如何在RSS Feed中显示ListView中的链接和描述？

这是我RssAdapter.java

package com.example.jaison.newsclient; 

import android.content.Context; 
import android.view.View; 
import android.view.ViewGroup; 
import android.widget.BaseAdapter; 
import android.widget.TextView; 
import java.util.List; 

public class RssAdapter extends BaseAdapter { 

private final List<RssItem> items; 
private final Context context; 

public RssAdapter(Context context, List<RssItem> items) { 
    this.items = items; 
    this.context = context; 
} 

@Override 
public int getCount() { 
    return items.size(); 
} 

@Override 
public Object getItem(int position) { 
    return items.get(position); 
} 

@Override 
public long getItemId(int id) { 
    return id; 
} 

@Override 
public View getView(int position, View convertView, ViewGroup parent) { 
    ViewHolder holder; 
    if (convertView == null) { 
     convertView = View.inflate(context, R.layout.rss_item, null); 
     holder = new ViewHolder(); 
     holder.itemTitle = (TextView) convertView.findViewById(R.id.itemTitle); 
     convertView.setTag(holder); 
    } else { 
     holder = (ViewHolder) convertView.getTag(); 
    } 
    holder.itemTitle.setText(items.get(position).getTitle()); 


    //need to show getdescription also 


return convertView; 
} 

static class ViewHolder { 
    TextView itemTitle; 
} 
}

这是我rss_item.xml

<?xml version="1.0" encoding="utf-8"?> 
<TextView xmlns:android="http://schemas.android.com/apk/res/android" 
android:id="@+id/itemTitle" 
android:layout_width="match_parent" 
android:layout_height="wrap_content" 
android:padding="8dp" 
android:textSize="18sp" />

Rssitem.java

package com.example.jaison.newsclient; 


public class RssItem { 

private final String title; 
private final String link; 
private final String description; 

public RssItem(String title, String link,String description) { 
    this.title = title; 
    this.link = link; 
    this.description=description; 
} 

public String getTitle() { 
    return title; 
} 

public String getDescription() { 
    return description; 
} 

public String getLink() { 
    return link; 
} 

}

这里另一个代码

package com.example.jaison.newsclient; 

import android.util.Xml; 

import org.xmlpull.v1.XmlPullParser; 
import org.xmlpull.v1.XmlPullParserException; 

import java.io.IOException; 
import java.io.InputStream; 
import java.util.ArrayList; 
import java.util.List; 

public class PcWorldRssParser { 

private static final String TAG_TITLE = "title"; 
private static final String TAG_DESCRIPTION= "description"; 
private static final String TAG_LINK = "link"; 
private static final String TAG_RSS = "rss"; 

// We don't use namespaces 
private final String ns = null; 

public List<RssItem> parse(InputStream inputStream) throws XmlPullParserException, IOException { 
    try { 
     XmlPullParser parser = Xml.newPullParser(); 
     parser.setFeature(XmlPullParser.FEATURE_PROCESS_NAMESPACES, false); 
     parser.setInput(inputStream, null); 
     parser.nextTag(); 
     return readFeed(parser); 
    } finally { 
     inputStream.close(); 
    } 
} 

private List<RssItem> readFeed(XmlPullParser parser) throws XmlPullParserException, IOException { 
    parser.require(XmlPullParser.START_TAG, null, TAG_RSS); 
    String title = null; 
    String link = null; 
    String description=null; 
    List<RssItem> items = new ArrayList<RssItem>(); 


    while (parser.next() != XmlPullParser.END_DOCUMENT) { 
     if (parser.getEventType() != XmlPullParser.START_TAG) { 
      continue; 
     } 

     String name = parser.getName(); 
     if (name.equals(TAG_TITLE)) { 
      title = readTitle(parser); 

     } else if (name.equals(TAG_LINK)) { 
      link = readLink(parser); 



     } 
     else if (name.equals(TAG_DESCRIPTION)) { 
      description = readDescription(parser); 



     } 
     if (title != null && link != null && description != null) { 
      RssItem item = new RssItem(title, link,description); 
      items.add(item); 
      title = null; 
      link = null; 
     } 
    } 
    return items; 
} 

private String readLink(XmlPullParser parser) throws XmlPullParserException, IOException { 
    parser.require(XmlPullParser.START_TAG, ns, TAG_LINK); 
    String link = readText(parser); 
    parser.require(XmlPullParser.END_TAG, ns, TAG_LINK); 
    return link; 
} 

private String readTitle(XmlPullParser parser) throws XmlPullParserException, IOException { 
    parser.require(XmlPullParser.START_TAG, ns, TAG_TITLE); 
    String title = readText(parser); 
    parser.require(XmlPullParser.END_TAG, ns, TAG_TITLE); 
    return title; 
} 
private String readDescription(XmlPullParser parser) throws XmlPullParserException, IOException { 
    parser.require(XmlPullParser.START_TAG, ns, TAG_DESCRIPTION); 
    String description = readText(parser); 
    parser.require(XmlPullParser.END_TAG, ns, TAG_DESCRIPTION); 
    return description; 
} 

// For the tags title and link, extract their text values. 
private String readText(XmlPullParser parser) throws IOException, XmlPullParserException { 
    String result = ""; 
    if (parser.next() == XmlPullParser.TEXT) { 
     result = parser.getText(); 
     parser.nextTag(); 
    } 
    return result; 
} 
}

并按照如何设置标题 –

包含rss_item的相同方式将描述设置为该问题。你可以进行修改并将其写为答案吗？@KingofMasses –

查看我的更新回答 –

答

你rss_item应该是这样的

<?xml version="1.0" encoding="utf-8"?> 
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    android:orientation="vertical" android:layout_width="match_parent" 
    android:layout_height="match_parent"> 

    <TextView xmlns:android="http://schemas.android.com/apk/res/android" 
     android:id="@+id/itemTitle" 
     android:layout_width="match_parent" 
     android:layout_height="wrap_content" 
     android:padding="8dp" 
     android:text="title" 
     android:textSize="18sp" /> 

    <TextView xmlns:android="http://schemas.android.com/apk/res/android" 
     android:id="@+id/itemDescription" 
     android:layout_width="match_parent" 
     android:layout_height="wrap_content" 
     android:padding="8dp" 
     android:text="discription" 
     android:textSize="14sp" /> 

</LinearLayout>

然后在getview它应该是这样的

@Override 
    public View getView(int position, View convertView, ViewGroup parent) { 
     ViewHolder holder; 
     if (convertView == null) { 
      convertView = View.inflate(context, R.layout.rss_item, null); 
      holder = new ViewHolder(); 
      holder.itemTitle = (TextView) convertView.findViewById(R.id.itemTitle); 
      holder.itemDescription = (TextView) convertView.findViewById(R.id.itemDescription); 
      convertView.setTag(holder); 
     } else { 
      holder = (ViewHolder) convertView.getTag(); 
     } 
     holder.itemTitle.setText(items.get(position).getTitle()); 
     holder.itemDescription.setText(items.get(position).getDescription()) 




return convertView; 
}

你的观点持有者应该是这样的

static class ViewHolder { 
    TextView itemTitle; 
    TextView itemDescription; 
}

在rss_item布局创建描述的TextView

但它显示一个标题和另一个说明 –

的意思是？它没有显示该项目的正确说明？ –

没有它没有显示 –

如何在RSS Feed中显示ListView中的链接和描述？

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